Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1)
One-Pot Synthesis of Menthol from Citral over Ni/H-β-38 Extrudates Containing Bentonite Clay Binder in Batch and Continuous Reactors
Julkaisun tekijät: Simakova Irina L.,Vajglová Zuzana,Martínez-Klimov Mark, Eränen Kari, Peurla Markus, Mäki-Arvela Päivi, Murzin Dmitry Yu
Kustantaja: American Chemical Society
Julkaisuvuosi: 2023
Journal: Organic Process Research and Development
Tietokannassa oleva lehden nimi: Organic Process Research and Development
Volyymi: 27
Julkaisunumero: 2
Aloitussivu: 295
Lopetussivun numero: 310
eISSN: 1520-586X
DOI: http://dx.doi.org/10.1021/acs.oprd.2c00337
Verkko-osoite: https://doi.org/10.1021/acs.oprd.2c00337
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/178643881
Optimization of bifunctional Ni catalysts was performed to enhance the catalytic performance in the one-pot synthesis of commercially valuable menthol from citral. The effect of nickel precursors (nitrate, chloride, acetate, and sulfate) and the addition of bentonite clay was investigated in citral transformations in a batch reactor at 70 °C and 10 bar hydrogen, demonstrating higher activity for the Ni-H-β-38-bentonite composite derived from a nickel nitrate precursor, which can be attributed to a higher surface area, optimal Brønsted to Lewis acidity and metal particle size, as well as the egg-shell distribution of Ni particles. H-β-38 impregnated with nickel nitrate, followed by calcination and reduction, was shaped with bentonite as a binder to give extrudates for exploring the citral transformations in the trickle-bed reactor at 50–70 °C and 10 bar hydrogen. The highest selectivity to the desired menthols of 45% was obtained with 70% stereoselectivity to the menthol isomer at 70 °C. The apparent activation energy for citral transformations to menthols of 18.6 kJ/mol indicated the presence of mass transfer limitations. Catalytic activity was linked with the physical-chemical properties, which were characterized by transmission electron microscopy, X-ray diffraction, temperature-programmed reduction, Fourier transform infrared spectroscopy with pyridine, N2 physisorption, and inductively coupled plasma–optical emission spectrometry methods.
Ladattava julkaisu This is an electronic reprint of the original article. |